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Summary of Significant Accounting Policies (Details Textual) (USD $) | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011 | Jan. 31, 2012 | Dec. 31, 2011
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 4 |  |  |
Summary of Significant Accounting Policies (Additional Textual) [Abstract] |  |  |  |  |  |
Maximum maturity period of cash equivalent investment |  |  | 3 months |  |  |
Aggregated cash posted as collateral in normal course of business | $ 600,000 |  | $ 600,000 |  |  |
Hedging losses secured under credit facility | 9,700,000 |  | 9,700,000 |  |  |
Payment received from weather hedge contract, per heating degree-day shortfall |  |  | 35,000 |  |  |
Derivative maximum payout |  |  |  |  | 12,500,000 |
Percentage of period covered in heating degree days . |  |  | 92.50% |  |  |
Comprehensive income (loss) | (11,400,000) | (17,800,000) | 32,846,000 | 52,300,000 |  |
Net income (loss) | (11,789,000) | (18,197,000) | 31,624,000 | 51,042,000 |  |
Unrecognized income tax benefit | 1,500,000 |  | 1,500,000 |  |  |
Amortization of unrealized pension plan gain | 700,000 | 700,000 | 2,064,000 | 2,100,000 |  |
Tax effect of unrealized gain on pension plan | (300,000) | (300,000) | (842,000) | (800,000) |  |
Net operating loss carry forward |  |  |  |  |  | 12,800,000
Unrecognized income tax benefit related to accrued interest | 300,000 |  | 300,000 |  |  |
Customer Lists [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Maximum period of trade names amortized on a straight line basis |  |  | 10 |  |  |
Minimum period of customer list amortized on a straight line basis |  |  | 7 |  |  |
Trade Names [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Maximum period of trade names amortized on a straight line basis |  |  | 20 |  |  |
Minimum period of customer list amortized on a straight line basis |  |  | 7 |  |  |
Noncompete Agreements [Member] |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |
Period of covenants on a straight- line basis |  |  | 5 |  |  |
Federal [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 4 |  |  |
New York [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 4 |  |  |
Connecticut [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 4 |  |  |
Pennsylvania [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 5 |  |  |
New Jersey [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Number of years for examination of federal income tax returns |  |  | 5 |  |  |
Maximum [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Expiration date of net operating loss carry forward |  |  | 2024 |  |  |
Annual limitation of future taxable income |  |  |  |  |  | 2,200,000
Minimum [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Expiration date of net operating loss carry forward |  |  | 2018 |  |  |
Annual limitation of future taxable income |  |  |  |  |  | $ 1,000,000
Call Option [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 1,400,000 | 5,000,000 | 1,400,000 | 5,000,000 |  |
Put Option [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 4,100,000 | 2,000,000 | 4,100,000 | 2,000,000 |  |
Synthetic Calls [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 44,600,000 | 42,600,000 | 44,600,000 | 42,600,000 |  |
Inventory [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 1,200,000 | 900,000 | 1,200,000 | 900,000 |  |
Swap contract to buy heating oil [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 4,800,000 | 2,100,000 | 4,800,000 | 2,100,000 |  |
Swap contracts to sell heating oil [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume |  | 12,600,000 |  | 12,600,000 |  |
Future contract to buy heating oil [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 47,000,000 | 8,000,000 | 47,000,000 | 8,000,000 |  |
Future contract to sell heating oil [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 51,500,000 | 9,300,000 | 51,500,000 | 9,300,000 |  |
Swap contract to buy gasoline [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 1,400,000 | 1,200,000 | 1,400,000 | 1,200,000 |  |
Swap contract to buy diesel [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume | 1,200,000 | 900,000 | 1,200,000 | 900,000 |  |
Synthetic calls to buy diesel [Member] |  |  |  |  |  |
Summary of Significant Accounting Policies (Textual) [Abstract] |  |  |  |  |  |
Derivative activity volume |  | 200,000 |  | 200,000 |  |

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- Definition The gross amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 21 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name FASB Interpretation (FIN) -Number 48 -Paragraph 15 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319 + Details
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